106 
S.A* NAT , VOL. XV, 
Sept. 20th , 1934. 
SOU1H AUSTRALIAN SHELLS. 
('Including descriptions of New Genera and Species). 
(By Bernard C. Cotton 5c F. K. Godfrey). 
PART XII. 
TROCHIDAE (Contd.) 
Cantharidus Montfort 1810 (= Cantharis Ferussac: 
= Elenchus Swainson 1840). Ovate-conic or pyramidal, not 
umbilicate; colours generally bright and variegated; smooth or 
spirally sculptured outside, brilliantly iridescent within; aperture 
less than half the length of the shell, longer than wide, ovate; 
columella more or less folded or toothed near the base. Type— 
Limax opalus Martyn 1784, = Trochus iris Gmelin 1790 (New 
Zealand). Distribution—Australasian seas, chiefly; in shallow 
water. Fossil—Pliocene, Animal with the eye-bearing pedun¬ 
cles long and the tentacles ciliiform; three pairs of epipodial 
cirri; foot short, obtuse behind. In the radula the central tooth 
has a body with broadly expanded supporting wings, a narrowed 
neck, which bears a simple cusp; this peduncle has on each side 
delicate wings. The lateral teeth, five on each side, increase in 
size from the inner to the outer one; this peculiarity, together 
with that of the central tooth, will enable. one to recognise a 
radula of this genus at a glance. The inner lateral is slender, 
narrowed toward the cusp, like the centrals, and sometimes 
bears a lamella behind the peduncle. The outer laterals are 
very broad, with one or several denticles on the cusp. There 
are no jaws. 
Cantharidus (subgenus). Shell rather thin, ovate-pointed,, 
whorls striated or smooth; columella rather straight, simple, not 
toothed. ( L. opalus Martyn, the type of the genus, is a New 
Zealand shell, large, up to 45 mm., obsoletely, distantly, spirally, 
grooved, whitish, with longitudinal zigzag markings of purple). 
C. pulcherrimus Wood, and C. lehmanni Menke with its variants 
lesueuri Fischer, ramburi Crosse, belong here. 
Phasianotrochus Fischer 1885, (subgenus.) (= Elenchus 
H. 5c A. Adams). Thick, solid, polished, elongated; ovate-point¬ 
ed; aperture ovate, longer than broad; columella arcuate, bear¬ 
ing usually a tooth-like projection in the middle. Type— T. 
badius Wood = eximius Perry, and its variants peroni Philippi. 
gracilis Anton, lenicostigma Menke. Here may be placed 
apicinus Menke, bellulus Dunker, irisodontes Quoy 5c Gaimard.. 
and nit id ulus Philippi. 
